Method of manufacturing metal composite material, metal composite material, method of manufacturing heat dissipating component, and heat dissipating component

Abstract

A method of manufacturing a metal composite material includes applying a mechanical impact force to a carbon material and a metal powder at such an intensity as capable of pulverizing the carbon material, thereby adhering the carbon material to a surface of the metal powder.

What is claimed is: 
     
       1. A composite material, comprising:
 a plurality of particles having a core-shell structure comprising:
 a core material that is a metal particle having a grain size from 40 μm to 3 mm; 
 a first shell material surrounding the core material, wherein the first shell material is a metal having a fine crystal structure with grain size less than the grain size of the core material; and 
 a second shell material having a thickness from 5 μm to 12 μm, surrounding the first shell material, wherein the second shell material is a metal-carbon composite comprising a carbon phase material in a metal matrix, and 
 wherein the second shell material has a rough surface in which a carbon phase material having hydrophilic properties protrudes from the rough surface. 
 
 
     
     
       2. The composite material according to  claim 1 , wherein the rough surface of the second shell material comprises the carbon phase material and crystal grains of the metal matrix. 
     
     
       3. The composite material according to  claim 1 , wherein the the core material comprises a metal selected from the group consisting of copper, silver, gold, aluminum, indium, and an alloy containing at least one of the metals selected from the group. 
     
     
       4. The composite material according to  claim 1 , wherein the carbon phase material is at least one material selected from the group consisting of carbon nanotubes, graphite, graphene, fullerene, and nanodiamond. 
     
     
       5. A heat dissipating component, comprising:
 a composite material adhered to a surface or an inner wall surface of the heat dissipating component, 
 wherein the composite material comprises an aggregate of particles having a core-shell structure comprising:
 a core material that is a metal particle having a grain size from 40 μm to 3 mm; 
 a first shell material surrounding the core material, wherein the first shell material is a metal having a fine crystal structure with grain size less than the grain size of the core material; and 
 a second shell material having a thickness from 5 μm to 12 μm, surrounding the first shell material, wherein the second shell material is a metal-carbon composite comprising a carbon phase material in a metal matrix, and 
 wherein the second shell material has a rough surface in which a carbon phase material having hydrophilic properties protrudes from the rough surface. 
 
 
     
     
       6. The heat dissipating component according to  claim 5 , wherein the rough surface of the second shell material comprises the carbon phase material and crystal grains of the metal matrix. 
     
     
       7. The heat dissipating component according to  claim 5 , wherein the core material comprises a metal selected from the group consisting of copper, silver, gold, aluminum, indium, and an alloy containing at least one of the metals selected from the group described above. 
     
     
       8. The heat dissipating component according to  claim 5 , wherein the carbon phase material is at least one material selected from the group consisting of carbon nanotubes, graphite, graphene, fullerene, and nanodiamond.